Musannaf Ibn Abi Shaybah 24501 — The testimony of one witness

It is narrated from Abu al-Zinad that Abd al-Hamid used to judge in Kufa on the basis of one witness and an oath. People of Kufa objected to this against him, so he wrote about it to Umar bin Abd al-Aziz. Umar bin Abd al-Aziz wrote to him that he should judge on the basis of one witness and an oath.